Nickel‐Catalyzed Electrochemical C(sp
<sup>3</sup>
)−C(sp
<sup>2</sup>
) Cross‐Coupling Reactions of Benzyl Trifluoroborate and Organic Halides**
作者:Jian Luo、Bo Hu、Wenda Wu、Maowei Hu、T. Leo Liu
DOI:10.1002/anie.202014244
日期:2021.3.8
electrochemical C(sp2)−C(sp3) cross‐coupling reaction of bench‐stable aryl halides or β‐bromostyrene (electrophiles) and benzylic trifluoroborates (nucleophiles) using nonprecious, bench‐stable NiCl2⋅glyme/polypyridine catalysts in an undivided cell configuration under ambient conditions. The broad reaction scope and good yields of the Ni‐catalyzed electrochemical coupling reactions were confirmed by
Cobalt-Catalyzed Reductive Cross-Coupling Between Styryl and Benzyl Halides
作者:Yingxiao Cai、Andreas D. Benischke、Paul Knochel、Corinne Gosmini
DOI:10.1002/chem.201603832
日期:2017.1.5
A simple and efficient protocol for the direct reductive cross‐coupling between alkenyl and benzylhalides using a Co/Mn system has been developed. This reaction proceeds smoothly in the presence of [CoBr2(PPh3)2] as the catalyst, with NaI as an additive in acetonitrile with a broad scope of functionalized alkenyl and benzylhalides. Different functional groups are tolerated on both coupling partners
Palladium-Catalyzed Reactions of Arylindium Reagents Prepared Directly from Aryl Iodides and Indium Metal
作者:Vardan Papoian、Thomas Minehan
DOI:10.1021/jo801074g
日期:2008.9.19
Treatment of aryl iodides with indium metal in the presence of lithiumchloride leads to the formation of an organoindium reagent capable of participating in cross-coupling reactions under transition-metal catalysis. Combination with aryl halides in the presence of 5 mol % Cl2Pd(dppf) furnishes biaryl compounds in good yields; similarly, reaction with acyl halides or allylic acetates/carbonates in
Dual nickel and Lewis acid catalysis for cross-electrophile coupling: the allylation of aryl halides with allylic alcohols
作者:Xue-Gong Jia、Peng Guo、Jicheng Duan、Xing-Zhong Shu
DOI:10.1039/c7sc03140h
日期:——
selectively. The reaction tolerates a wide range of functional groups (e.g. silanes, boronates, anilines, esters, alcohols, and various heterocycles) and works with various allylicalcohols. Complementary to most current routes for the C3 allylation of an unprotected indole, this method provides access to C2 and C4–C7 allylated indoles. Preliminary mechanistic experiments reveal that the reaction might start
Nickel-catalyzed reductive allylation of aryl bromides with allylic acetates
作者:Xiaozhan Cui、Shulin Wang、Yuwei Zhang、Wei Deng、Qun Qian、Hegui Gong
DOI:10.1039/c3ob40232k
日期:——
This paper highlights Ni-catalyzed allylation of electron-rich aryl bromides with a variety of substituted allyliccarbonates using zinc as the terminal reductant, affording E-alkenes regioselectively in good to excellent yields by the addition of aryl to the less hindered allylic carbon. The electron-deficient aryl bromides and chlorides are also highly efficient coupling partners.